Printer for instrument scales



2 1944- T. SLONCZEWSKI PRINTER FOR INSTRUMENT SCALES Filed Dec. 23, 19412 Sheets-Sheet 1 INVENTOR 7.'$LONCZEW5K/ AT TORNE V Feb. 22, 19 'r.SLONCZEWSKI PRINTER FOR INSTRUMENT SCALES Filed Dec. 23, 1941 2Sheets-Sheet 2 FIG. 3

//v VEN TOR 7. SLONCZEWSK/ ATTORNEY Patented Feb. 22, 1.944

PRINTER. FOR INSTRUMENT SCALES Thaddeus Sioncsewski, Glenwood Landing,N. Y.,

asslgnor to Bell Telephone Laboratories, Incorporated, New York, N. Y.,a corporation or New York Application December as, 1941, Serial No.424,132

2 Claims.

This invention relates to an apparatus for printing instrument scalesand more particularly to a means for printing the subdivisions oninstrument scales subsequent to the manual calibration of a series orpredetermined discrete points on the scales.

Manual calibration of instrument scales is usu ally accomplished byinscribing thereon a series of discrete calibration marks throughout thelength of the scale. Subdivisions arethereafter printed between thesediscrete calibration marks by geometrically dividing the spaces betweenthem into equal parts. Most indicating instruments are so designed thatthe adjacent spaces between these calibration marks do not differgreatly. subdividing these spaces into equal parts, therefore,introduces no appreciable error and is entirely practicable.

It is the object of this invention to provide an apparatus for rapidlyand accurately printing the subdivisions between the previouslycalibrated points on an instrument scale.

The foregoing object is achieved by this invention by providing aspecially constructed printing press having a plurality of printingrules on its type bed corresponding to the subdivisions to be printedand an adjusting mechanism for simultaneously adjusting the distancesbetween the rules by proportional amounts.

The invention may be better understood by referring to the accompanyingdrawings, in which:

Fig. 1 shows schematically the linkage mechanism of a manually operatedprinting press adapted for the practice of this invention;

Fig. 2 is a front view of the specially constructed type bed disclosingthe mechanism for simultaneously adjusting the distances between theprinting rules;

Fig. 3 shows how the printing rules may be aligned with the previouslyinscribed calibration indicia;

Fig. 4 shows a section through one of the printing rules;

Fig. 5 shows an end View and partial sectionthrough a portion 01' Fig.2; and

Fig. 6 discloses an alternative form of type bed mechanism.

Referring now more particularly to Fig. 1 wherein a printing pressmechanism I is shown in schematic form. The linkage as shown comprisesessentially three movable links 8. A handle 8 is attached to one ofthese links for operating the press in'a well-known manner. Cooperatingwith this linkage is a bed 2, a platen anism for operating the pressalso moves ink roll 5 over type bed 2 and onto ink disc 4. As themechanism for performing this function is common to all printing pressesof this type, it is not shown in order to simplify the description. Areflector I2 is supported by a rod ll secured to a portion l0 0! thepress linkage.

Type bed 2 has supported thereon a plurality of printing rules or bars Iand It, more particularly hereinafter described in connection with Fig.2. These printing rules are adapted to print a series of lines on aninstrument scale I! held by platen 3. A detailed description of theoperation of the printing press per se is entirely unnecessary as itsoperation is essentially idential with all hand-operated printingpresses.

In order to practice this invention itis un necessary to employ theparticular type of linkage disclosed in Fig. 1 as any other type ofprinting press linkage commonly used with either hand-operated pressesor with any of the wellknown Job presses may be used. The particularlinkage here shown was chosen for illustrative purposes only.

The plane of reflector I2 is so positioned with respect to the plane ofthe platen 3 and the plane of bed 2 as to bisect the angle 0 formedthereby. An observer's eye it may be placed above the press so as toview both the images of the printing rules 1 and I5 and the two adjacentcalibration marks on the-instrument scale l3. In this position the planeof the images of rules I and I5 will exactly coincide with the plane ofthe instrument scale l3 so as to avoid any possible difliculty withparallax. The use of the reflector in the manner just described insuresaccurate registration of the printing rules 1 and IS with the previouslyinscribed indicia on the instrument scale l3.

Fig. 2 shows one form of specially constructed type bed for the practiceof this invention. A plurality of short printing rules I and a longerone I! are provided for printing the scale. The previously inscribedindicia made during calibration are usually made in pencil and requireprinting over with ink in order to insure permanence, legibility anduniformity in appearance. The longer printing rule l5, mounted integralwith slide I8, is provided for this purpose. Slide [8 is adapted foraccurate sliding motion in grooves provided in bed 2. The interveningsubdivisions are printed by the short printing rules I of which four areshown in Fig. 2. Obviously "a different number of printing rules I mustbe 3, an ink disc 4 and an ink roll 5. The mech- 66 employed where theparticular scale to be printed requires a different number ofsubdivisions.

Printing rules I are mounted on a plurality of parallel bars I which inturn are attached to two pantograph systems 2|, 2. An additional bar I!is mounted integral with bed plate 2 by means oi pivots 23, 22. an indexline II is inscribed on bar II for alignment purposes as will be moreparticularly described hereinafter in connection withl 'ig. 3. Pivotpoints 22 01' the pantograph systems are attached to slide It in linewith printing rule II and it will be understood that as slide I8 is slidlaterally in bed 2 the two pantois mounted to a threaded shaft whichcooperates with a threaded hole in a lug l8 integral with slide ll.Clearance is provided for lug I8 in bed 2 by a longitudinal slot 2|formed in the back of the bed.

In practicing this invention the eye is placed directly over thereflector and-scale to be printed as shown in Fig.1. The scale it andthe images of the printing rules I and IE will then be seensimultaneously in the same plane as shown in Fig. 3. In thisu lreflector I2 is shown superimposed over scale [3. Reference charactersI, i5 and II denote the images of their corresponding printing rules I,It and the index line l6 inscribed on bar ll asshown in Fig.2. Since,

as previously stated, these images are in exactly the same plane as thescale I3, they do not move with respect to the marks on scale It whenthe eye I4 is moved about over the press. The longer printed lines 2| onscale It were made by printing rule ll during the preceding impressionsoi the press. The tour intervening shorter marks were made by the fourprinting rules I. Reference character 2| denotestwo of the previouslyinscribed calibration marks made temporarily by pencil preparatory tothe final printing in accord ance with this invention. After thepreceding impression by the printing press has been made the Fig. 4shows a section through one of the type rules I and its supporting barI. A section through printing rule ll would appear the same except thatinstead or being two pieces it would,

be one piece and attached to slide ll. Itwill be understood,oi course,that the indicia are printed by the raised portion 34 of these rules.

Fig. 5 shows an end view and partial section or the mechanism shown inFig. 2. Here it will be seen how slide II is precision mounted in bedplate 2. A pair of slots ll, 30 cut in slide I! provides means forconnecting pantograph mechanism 24, 24 to the plurality oi bars 8through a series 01' spacers 3|, two of which have been shown dotted inFig. 2. Pivot point 23 is additionally attached directly to bed plate 2by means of a boss 32. Pivot points 22, 22 are attached directly toslide I8 from the underside, while the pivot points 33 for-the iourinterveningbars are all attached to their corresponding pantograph linkthrough one of the spacers 3|.

Fig. 6 discloses an alternative form or mechanism for bed 2. In Fig. 2the pantograph mechanisms 24, 24 were mounted between slide it and bed 2whereas in Fig. 6 these pants graph mechanisms-are mounted on top ofslide ll. With this type of construction the spacers 3! are not neededbut the short bosses 32 01' Fig. 5 are extended through the slots ill asindicated by reference character 35 in Fig. 6. This form of mechanism isoperated in the same manner as the mechanism of Fig. 2 and thecorresponding parts of the two figures have the same reierpress isopened and scale I! is'slid along platen 3 until the lastlong printedmark 28 exactly coincides with the image II oi index mark ll.

It will be remembered that index mark it is always stationary withrespect to bed '2. Knob I9 is then turned until the image I5 of printingrule ll exactly coincides with the next previously calibration mark 29.Since movement of knob It does not displace the index mark it,

the coincidence or line 2| with respect to the image ll is'notdisturbed. After this adjustment has been completed the tour subdivisionmarks corresponding with printing rules I as well as the long linecorresponding with printing rule I! are simultaneously printed by simplyoperating the printing press. when the impression is com- I encecharacters.

What is claimed is: Y

1. Means for printing subdivisions on instrument scales comprising aprinting press including as parts thereof a platen and a type bed, a

plurality of printing rules on the type bed corresponding to thesubdivisions to be printed, a

.' reflector positioned to form images of said printing rules in theplane of the platen when the press is open, and an adjusting mechanismfor simultaneously adjusting the distances between all of said rules byproportional amounts.

2. Means for printing subdivisions on instrument scales comprising aprinting press including as'parts thereof a platen and a type bed eachcomprising substantially plane surfaces adapted to form a dihedral'anglewhen the press is open, a plurality of printing rules on said type bedcorresponding to the subdivisions to be printed,

a plane surface reflector so positioned with respect to the type bed andplaten as to bisect the angel formed by their planes when the press isopened whereby the images of said printing rules are caused to lie inthe plane or the platen when the press is open, and an adjustingmechanism for simultaneously adjusting the distances between .all ofsaid rules by roportional amounts.

'I'HADDEUS SLONCZEWSKI.

